CN102355613B - Multimedia broadcast car audio - Google Patents
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Abstract
The invention discloses a multimedia broadcast car audio, comprising audio circuits and a power supply module, and further comprising a radio module with data broadcasting reception function, a control unit for controlling each of the circuits and demodulating the data broadcasting, and a display module for displaying play information and data broadcasting information, wherein the audio circuits, the radio module, and the display module are connected with the control unit, and the power supply module are connected with each circuit through the control unit. The multimedia broadcast car audio disclosed by the invention can receive data sent by the data broadcasting system, capable of not only displaying relevant information about broadcasting programs, such as station names, program contents, etc., but also promptly receiving emergency information, road traffic information, etc., thereby greatly improving existing FM (frequency modulation) function, enhancing the recreation and practicability of car audios, and playing a positive role in promoting the construction of the data broadcasting system in China.
Description
Technical field
The present invention relates to a kind of automobile audio, particularly a kind of automobile audio of multimedia broadcasting.
Background technology
At present, along with the function of automobile audio is in continuous increase, product is constantly being reformed, its amusement performance is in continuous enhancing, but FM broadcasting is occupying very consequence in automobile entertainment always, no matter be mostly embedded in FM radio reception part in automobile audio or such as MP3, smart mobile phone, PDA product; Particularly in driving procedure, FM FM broadcasting function of radio receiver especially continually use by driver and conductor, FM broadcasting radio equipment is not only easy to use, wide coverage, travelling performance is high, and can real-time broadcast listening possess well recreational, be indispensable part in automobile equipment all the time.
Be combined with the automobile audio of FM function of radio receiver, the music carried can not only be play by playback equipment, and user can be allowed to use automobile audio to play FM station broadcast easily, enrich the amusement performance of automobile audio, but FM broadcast capability is too simple, in use often can only according to adjusted channel selection radio station, the program can only play from heard content conjecture radio station, thus the very large time is taken on the channel selecting oneself to need.
Radio Data System is the new and high technology appearing at radio broadcasting field in recent years.It utilizes existing frequency modulation equipment the excessive data of some non-voice data with being loaded on the additional channel of f-m stereo Acoustic channel after ovennodulation, be embodied in especially in traffic information broadcasting, like this, on the basis of these data increased more, Radio Data System just has deal with data, word, the ability of symbol and information, traffic information broadcasting can be used for, Radio Paging, background music, can large area networking, the distinguishing features such as reliability is high, scheme based on Radio Data System will demonstrate increasing technological merit, simple due to Radio Data System, data broadcast will progressively be applied.
Because Radio Data System utilizes the subcarrier in FM multiplex to provide Data Information Service while transmission of audio signal, and existing FM radio equipment does not receive the ability of data broadcast, therefore receive data broadcasting signal time to be used in and using FM radio equipment simultaneously, necessarily existing radio equipment is upgraded, and can not accept data broadcasting signal on the market at present and the hoot device utilized, cause the slower development of Radio Data System, social application degree is not high.
Summary of the invention
For solving the problem, promoting the development of Radio Data System, the object of the present invention is to provide and a kind ofly can receive data broadcasting signal and a kind of multimedia broadcast car audio that it is applied.
The present invention solves the technical scheme that its problem adopts:
A kind of multimedia broadcast car audio, comprise for the voicefrequency circuit of output audio, to the power module of each circuit supply, also comprise there is data broadcast reception function radio module, for control each circuit and to data broadcast carry out demodulation control unit, for the information of displaying the play and display data broadcasting information display module; Described voicefrequency circuit, radio module, display module are connected with control unit, and power module is connected with each circuit by control unit.
Further, described radio module adopts the TDA7703R radio chip with radio reception and data broadcast reception function.Advanced person's numeral Low Medium Frequency framework of the built-in DSP of TDA7703R radio chip, without the need to artificial adjustment, all AM/FM that just can realize being input to from antenna audio frequency output accept function, this chip not only volume is little, quality is light, and support multiple Serial Control mode, so be specially adapted in vehicle audio of the present invention and other small-sized portable equipments; TDA7703R radio chip can realize AM, FM, mute function, automatic calibration frequency-shift keying, the stereo process of FM; Export for analog and digital voice.TDA7703R radio chip can receive data broadcasting signal, makes multimedia broadcast car audio of the present invention can automatically report various message and news; It possesses advanced automatic channel search algorithm, fully integrated global tuned frequency, also possesses Radio Data System fast and the efficient phase-locked loop circuit established.
Further, described control unit adopts the RF8806 control chip with control and data broadcast demodulation function.RF8806 control chip can carry out demodulation and process to the data broadcasting signal that radio module receives well, makes multimedia broadcast car audio of the present invention process this signal and to apply.
Preferably, No. 30 RSTN pins of TDA7703R chip are connected with No. 28 pin PLL_CE of RF8806 by TU_RST interface, make the operation that control unit can reset to radio module by this pin, No. 29 RDSINT pins of TDA7703R are connected with No. 28 pin PLL_CE of RF8806 by TU_INT interface, No. 27 SCL pins of TDA7703R are connected with No. 26 pin PLL_CLK/STIN of RF8806 by TU_SCL interface, No. 26 SDA pins of TDA7703R are connected with No. 27 pin PLL_DATA of RF8806 by TU_SDA interface, this connected mode makes control unit communicate with the mode of radio module by universal serial bus, digital broadcast data radio module received and control information deliver to control centre by this connection, factor data broadcast message comprises 16 group codings, comprise station name information, program of radio station type information, traffic radio indication information, whether radio station is playing the indication information of traffic message, the tranmitting frequency table in radio station, SIC station identification code, RTA Radio Text display information, time adjustment information, control centre extracts corresponding data broadcasting information to the reconstruct of its decoding data and shows this information or controlled.
Preferably, the VCC-DAC pin of described TDA7703R chip, VDD-1V2 pin, GND-1V2 pin are all connected with 78M05 voltage stabilizing circuit, think that its pin provides suitable stable voltage.
Preferably, the DACOUTR pin serial connection of described TDA7703R chip has the electric capacity of 224u and the resistance of 3.3k to be connected to radio module audio output interface TUN-R; The DACOUTL pin serial connection of TDA7703 chip has the electric capacity of 224u and the resistance of 3.3k to be connected to radio module audio output interface TUN-L, TUN-R and TUN-L is connected to the audio input end of voicefrequency circuit.
Further, also comprise audio decoder module, audio decoder module comprises audio decoding unit, memory cell interface; Described audio decoding unit is connected with control unit, and control unit reads the data inside external storage equipment by audio decoding unit and memory cell interface.Audio decoder module can be decoded to audio file, and control unit reads the data inside memory device by controlling audio decoding unit reading cells interface and decodes, and decoded data is transferred to voicefrequency circuit and exports.
Preferably, described audio decoding unit adopts the MP3/WMA decoding chip of the TMD55D of NEC Corporation.This chip has good decoding function, can decode to audio files such as MP3/WMA and further process, this chip better adaptability in the present invention, the number of peripheral circuit element can not only be reduced, reduce production cost, and the performance of this practical new product in audio entertain mem can be improved.
Further, described memory cell interface comprises the SD card interface matched with SD card and/or the USB interface matched with circumscribed USB storage equipment.Adopt the energy SD card interface of external SD card and/or the USB interface of circumscribed USB storage equipment, user can be facilitated to change memory device, strengthen the ability of multimedia broadcast car audio displaying audio file.
Further, described voicefrequency circuit comprises for the treatment of the audio frequency processing circuit of audio signal, for the power amplifier that amplifies and the loud speaker for output sound; Control unit is by audio frequency processing circuit, power amplifier, loud speaker output sound.Voice data is delivered to and after audio frequency processing circuit carries out the process such as digital-to-analogue conversion, noise reduction, volume adjustment to it, audio frequency simulation is delivered to power amplifier and amplify by control unit, finally outputs to loud speaker.
Further, described power module comprises the voltage stabilizing circuit, the electric power management circuit for managing electrical power that are connected with automobile power source, and described electric power management circuit is connected with control unit with voltage stabilizing circuit.Electric power management circuit and voltage stabilizing circuit can play the effect of stabilizing cars supply voltage, after ensureing that each circuit of multimedia broadcast car audio is in stable operating voltage, ensure that normal operation of the present invention.
Further, described display module comprises display screen and for driving the display driver circuit of display screen, and described display driver circuit is connected with control unit by releasable connection interface.Display module of the present invention can not only display the play the fileinfo of audio frequency and/or the channel of radio reception, and can show the information of data broadcasting signal, improves the present invention further to the application of data broadcasting signal; Releasable connection interface can facilitate user to change different devices, facilitates maintenance and expanded application.
Further, control unit is connected with LED control module and/or key-press module by releasable connection mouth.LED control module and key-press module can facilitate user to the operation of multimedia broadcast car audio, strengthen practicality of the present invention.
The invention has the beneficial effects as follows: a kind of multimedia broadcast car audio that the present invention adopts, comprise for the voicefrequency circuit of output audio, to the power module of each circuit supply, also comprise there is data broadcast reception function radio module, for control each circuit and to data broadcast carry out demodulation control unit, for the information of displaying the play and display data broadcasting information display module; Described voicefrequency circuit, radio module, display module are connected with control unit, and power module is connected with each circuit by control unit.The radio module that multimedia broadcast car audio of the present invention has data broadcast reception function by it receives the data that Radio Data System sends, and the data after reception are delivered to control unit process and realized following functions:
When user's displaying audio file or when listening to certain radio station in driving way, if local Radio Data System has the important hints information about local transit to insert, data broadcast radio station can send a traffic message and insert signal, when after radio module Received signal strength, this signal is reached control power supply, control unit can suspend the broadcasting of playing current audio file or radio station, thus play important traffic message, make user can receive transport information in time when driving, allow user can change route according to traffic message early, convenient trip.
There is a program category attribute in each data broadcast radio station, when user is when receiving data broadcast radio station, control centre controls display driver circuit and shows current program category on a display screen, according to oneself, user can like that selecting to allow main control unit control radio module search for the type wherein liked, thus the efficiency of raising user search institute favorite channel.
Data broadcast radio station generally can cover corresponding multiple tranmitting frequency feasible region, for realizing the switching of radio module in these frequencies, Radio Data System can send an AF table to radio module, when another area gone to by automobile from an area, control unit can receive the different channel of AF table conversion according to radio module, thus keep radio reception clear, ensure radio reception quality.
The data broadcast that data broadcast radio station sends comprises inventory and/or its related content of its broadcast program, when user is when listening to this program of radio station, control unit is by the data of process radio module transmission, data after process are delivered to display module show, the content allowing user carefully need not listen to radio station could judge the program listened to, as long as just can be known the program listened to by display module, improve the efficiency of user search program widely, enhance the function of FM radio reception.
A kind of multimedia broadcast car audio of the present invention, substantially increases the recreational of FM radio reception and practicality, and the present invention is that Radio Data System provides a kind of good received vector, promotes the development of Radio Data System and technology thereof.
Accompanying drawing explanation
Below in conjunction with accompanying drawing and example, the invention will be further described.
Fig. 1 is the system principle diagram of multimedia broadcast car audio of the present invention.
Fig. 2 is the radio module circuit diagram of multimedia broadcast car audio of the present invention.
Fig. 3 is the control unit circuit diagram of multimedia broadcast car audio of the present invention.
Embodiment
With reference to Fig. 1-Fig. 3, a kind of multimedia broadcast car audio of the present invention, comprise the voicefrequency circuit 1 for output audio, the power module 2 to each circuit supply, also comprise there is data broadcast reception function radio module 3, for control each circuit and to data broadcast carry out demodulation control unit 4, for the information of displaying the play and display data broadcasting information display module 5; Described voicefrequency circuit 1, radio module 3, display module 5 are connected with control unit 4, and power module 2 is connected with each circuit by control unit 4.The data that radio module 3 pairs of Radio Data Systems that multimedia broadcast car audio of the present invention has data broadcast reception function by it send receive, data after reception are delivered to control unit 4 and are processed and realize following functions: when user's displaying audio file or when listening to certain radio station in driving way, if local Radio Data System has the important hints information about local transit to insert, data broadcast radio station can send a traffic message and insert signal, when after radio module 3 Received signal strength, this signal is reached control power supply, control unit 4 can suspend the broadcasting of playing current audio file or radio station, thus play important traffic message, make user can receive transport information in time when driving, allow user can change route according to traffic message early, convenient trip, there is a program category attribute in each data broadcast radio station, when user is when receiving data broadcast radio station, control centre controls display driver circuit 52 and show current program category on display screen 51, according to oneself, user can like that selecting to allow main control unit control radio module 3 searches for the type wherein liked, thus improve the efficiency of user search institute favorite channel, data broadcast radio station generally can cover corresponding multiple tranmitting frequency feasible region, for realizing the switching of radio module 3 in these frequencies, Radio Data System can send an AF table to radio module 3, when another area gone to by automobile from an area, control unit 4 can receive the different channel of AF table conversion according to radio module 3, thus keep radio reception clear, ensure radio reception quality, the data broadcast that data broadcast radio station sends comprises inventory and/or its related content of its broadcast program, when user is when listening to this program of radio station, the data that control unit 4 is transmitted by process radio module 3, data after process are delivered to display module 5 show, the content allowing user carefully need not listen to radio station could judge the program listened to, as long as just can be known the program listened to by display module 5, improve the efficiency of user search program widely, enhance the function of FM radio reception.
Further, described radio module 3 adopts the TDA7703R radio chip with radio reception and data broadcast reception function.Advanced person's numeral Low Medium Frequency framework of the built-in DSP of TDA7703R radio chip, without the need to artificial adjustment, all AM/FM that just can realize being input to from antenna audio frequency output accept function, this chip not only volume is little, quality is light, and support multiple Serial Control mode, so be specially adapted in vehicle audio of the present invention and other small-sized portable equipments; TDA7703R radio chip can realize AM, FM, mute function, automatic calibration frequency-shift keying, the stereo process of FM; Export for analog and digital voice.TDA7703R radio chip can receive data broadcasting signal, makes multimedia broadcast car audio of the present invention can automatically report various message and news; It possesses advanced automatic channel search algorithm, fully integrated global tuned frequency, also possesses Radio Data System fast and the efficient phase-locked loop circuit established.
Further, described control unit 4 adopts the RF8806 control chip with control and data broadcast demodulation function.RF8806 control chip can carry out demodulation and process to the data broadcasting signal that radio module 3 receives well, makes multimedia car audio of the present invention process this signal and to apply.
Preferably, No. 30 RSTN pins of TDA7703R chip are connected with No. 28 pin PLL_CE of RF8806 by TU_RST interface, make the operation that control unit 4 can reset to radio module 3 by this pin, No. 29 RDSINT pins of TDA7703R are connected with No. 28 pin PLL_CE of RF8806 by TU_INT interface, No. 27 SCL pins of TDA7703R are connected with No. 26 pin PLL_CLK/STIN of RF8806 by TU_SCL interface, No. 26 SDA pins of TDA7703R are connected with No. 27 pin PLL_DATA of RF8806 by TU_SDA interface, this connected mode makes control unit 4 communicate with the mode of radio module 3 by universal serial bus, the digital broadcast data receive radio module 3 and control information deliver to control centre by this connection, factor data broadcast message comprises 16 group codings, comprise station name information, program of radio station type information, traffic radio indication information, whether radio station is playing the indication information of traffic message, the tranmitting frequency table in radio station, SIC station identification code, RTA Radio Text display information, time adjustment information, control centre extracts corresponding data broadcasting information to the reconstruct of its decoding data and shows this information or controlled.
Preferably, the VCC-DAC pin of described TDA7703R chip, VDD-1V2 pin, GND-1V2 pin are all connected with 78M05 voltage stabilizing circuit 21, think that its pin provides suitable stable voltage.
Preferably, the DACOUTR pin serial connection of described TDA7703R chip has the electric capacity of 224u and the resistance of 3.3k to be connected to radio module 3 audio output interface TUN-R; The DACOUTL pin serial connection of TDA7703R chip has the electric capacity of 224u and the resistance of 3.3k to be connected to radio module 3 audio output interface TUN-L, TUN-R and TUN-L is connected to the audio input end of voicefrequency circuit 1.
Further, also comprise audio decoder module 6, audio decoder module 6 comprises audio decoding unit 61, memory cell interface 62; Described audio decoding unit 61 is connected with control unit 4, and control unit 4 reads the data inside external storage equipment by audio decoding unit 61 and memory cell interface 62.Audio decoder module 6 can be decoded to audio file, and control unit 4 reads the data inside memory device by controlling audio decoding unit 61 reading cells interface 62 and decodes, and decoded data is transferred to voicefrequency circuit 1 and exports.
Preferably, described audio decoding unit 61 adopts the MP3/WMA decoding chip of the TMD55D of NEC Corporation.This chip has good decoding function, can decode to audio files such as MP3/WMA and further process, this chip better adaptability in the present invention, the number of peripheral circuit element can not only be reduced, reduce production cost, and the performance of this practical new product in audio entertain mem can be improved.
Further, described memory cell interface 62 comprises the SD card interface 621 matched with SD card and/or the USB interface 622 matched with circumscribed USB storage equipment.Adopt the energy SD card interface 621 of external SD card and/or the USB interface 622 of circumscribed USB storage equipment, user can be facilitated to change memory device, strengthen the ability of multimedia broadcast car audio displaying audio file.
Further, described voicefrequency circuit 1 comprises for the treatment of the audio frequency processing circuit 11 of audio signal, for the power amplifier 12 that amplifies and the loud speaker 13 for output sound; Control unit 4 is by audio frequency processing circuit 11, power amplifier 12, loud speaker 13 output sound.Voice data is delivered to and after audio frequency processing circuit 11 carries out the process such as digital-to-analogue conversion, noise reduction, volume adjustment to it, audio frequency simulation is delivered to power amplifier 12 and amplify by control unit 4, finally outputs to loud speaker 13.
Further, described power module 2 comprises the voltage stabilizing circuit 21, the electric power management circuit 22 for managing electrical power that are connected with automobile power source, and described electric power management circuit 22 is connected with control unit 4 with voltage stabilizing circuit 21.Electric power management circuit 22 and voltage stabilizing circuit 21 can play the effect of stabilizing cars supply voltage, after ensureing that each circuit of multimedia broadcast car audio is in stable operating voltage, ensure that normal operation of the present invention.
Further, described display module 5 comprises display screen 51 and for driving the display driver circuit 52 of display screen 51, and described display driver circuit 52 is connected with control unit 4 by releasable connection interface 53.Display module 5 of the present invention can not only display the play the fileinfo of audio frequency and/or the channel of radio reception, and can show the information of data broadcasting signal, improves the present invention further to the application of data broadcasting signal; Releasable connection interface 53 can facilitate user to change different devices, facilitates maintenance and expanded application.
Further, control unit 4 is connected with LED control module 7 and/or key-press module 8 by releasable connection interface 53.LED control module 7 and key-press module 8 can facilitate user to the operation of multimedia broadcast car audio, strengthen practicality of the present invention.
The above, just preferred embodiment of the present invention, the present invention is not limited to above-mentioned execution mode, as long as it reaches technique effect of the present invention with identical means, all should belong to protection scope of the present invention.
Claims (9)
1. a multimedia broadcast car audio, comprise for output audio voicefrequency circuit (1), to the power module of each circuit supply (2), it is characterized in that: also comprise there is data broadcast reception function radio module (3), for control each circuit and to data broadcast carry out demodulation control unit (4), for the information of displaying the play and display data broadcasting information display module (5), described voicefrequency circuit (1), radio module (3), display module (5) is connected with control unit (4), power module (2) is connected with each circuit by control unit (4), there is a program category attribute in each data broadcast radio station, when user is when receiving data broadcast radio station, control centre controls display module (5) and shows current program category, when user's displaying audio file or when listening to certain radio station in driving way, if local Radio Data System has the important hints information about local transit to insert, data broadcast radio station can send a traffic message and insert signal, when after radio module (3) Received signal strength, this signal is reached control power supply, control unit (4) can suspend the broadcasting of playing current audio file or radio station, thus play important traffic message, for realizing the switching of radio module 3 in these frequencies, Radio Data System can send an AF table to radio module 3, when another area gone to by automobile from an area, control unit 4 can receive the different channel of AF table conversion according to radio module 3, thus keep radio reception clear, ensure radio reception quality.
2. a kind of multimedia broadcast car audio according to claim 1, is characterized in that: described radio module (3) adopts the TDA7703R radio chip with radio reception and data broadcast reception function.
3. a kind of multimedia broadcast car audio according to claim 1 and 2, is characterized in that: described control unit (4) adopts the RF8806 control chip with control and data broadcast demodulation function.
4. a kind of multimedia broadcast car audio according to claim 1, is characterized in that: also comprise audio decoder module (6), and audio decoder module (6) comprises audio decoding unit (61), memory cell interface (62); Described audio decoding unit (61) is connected with control unit (4), and control unit (4) reads the data inside external storage equipment by audio decoding unit (61) and memory cell interface (62).
5. a kind of multimedia broadcast car audio according to claim 4, is characterized in that: described memory cell interface (62) comprises the SD card interface (621) matched with SD card and/or the USB interface (622) matched with circumscribed USB storage equipment.
6. a kind of multimedia broadcast car audio according to claim 1, is characterized in that: described voicefrequency circuit (1) comprises for the treatment of the audio frequency processing circuit (11) of audio signal, for the power amplifier (12) that amplifies and the loud speaker (13) for output sound; Control unit (4) is by audio frequency processing circuit (11), power amplifier (12), loud speaker (13) output sound.
7. a kind of multimedia broadcast car audio according to claim 1, it is characterized in that: described power module (2) comprises the voltage stabilizing circuit (21), the electric power management circuit (22) for managing electrical power that are connected with automobile power source, and described electric power management circuit (22) is connected with control unit (4) with voltage stabilizing circuit (21).
8. a kind of multimedia broadcast car audio according to claim 1, it is characterized in that: described display module (5) comprises display screen (51) and for driving the display driver circuit (52) of display screen (51), described display driver circuit (52) is connected with control unit (4) by releasable connection interface (53).
9. a kind of multimedia broadcast car audio according to claim 1, is characterized in that: control unit (4) is connected with LED control module (7) and/or key-press module (8) by releasable connection interface (53).
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| CN201110284827.6A CN102355613B (en) | 2011-09-23 | 2011-09-23 | Multimedia broadcast car audio |
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| CN201110284827.6A CN102355613B (en) | 2011-09-23 | 2011-09-23 | Multimedia broadcast car audio |
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| CN102355613B true CN102355613B (en) | 2015-02-04 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103426322A (en) * | 2012-05-14 | 2013-12-04 | 上海博泰悦臻电子设备制造有限公司 | System and method for providing prompt information |
| CN107465975B (en) * | 2017-07-12 | 2020-01-31 | 成都驰通数码系统有限公司 | method for controlling tuner by vehicle-mounted music player |
| CN114710174A (en) * | 2022-03-09 | 2022-07-05 | 陕西科技大学 | Emergency broadcast receiving device of vehicle-mounted digital radio broadcast |
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| CN1551518A (en) * | 2003-05-08 | 2004-12-01 | ���������Զ�ϵͳ�ɷ�����˾ | Background tuner of a radio broadcast receiver to receive traffic and travel information (TTI) |
| CN101272194A (en) * | 2007-03-19 | 2008-09-24 | 许丰 | Intelligent broadcasting station receiving method and device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1226828C (en) * | 2003-07-30 | 2005-11-09 | 上海源创数码科技有限公司 | Multimedia information releasing system for building |
| CN100377581C (en) * | 2005-07-12 | 2008-03-26 | 倚天资讯股份有限公司 | Digital broadcast receiver capable of switching radio wave mode output |
| JP4904895B2 (en) * | 2006-04-12 | 2012-03-28 | ソニー株式会社 | Antenna device |
| CN202222044U (en) * | 2011-09-23 | 2012-05-16 | 江门市奥威斯电子有限公司 | Multimedia broadcast automobile sound system |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1551518A (en) * | 2003-05-08 | 2004-12-01 | ���������Զ�ϵͳ�ɷ�����˾ | Background tuner of a radio broadcast receiver to receive traffic and travel information (TTI) |
| CN101272194A (en) * | 2007-03-19 | 2008-09-24 | 许丰 | Intelligent broadcasting station receiving method and device |
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